1

脸书 SDK 3.2

在使用 Facebook 登录后,我需要在 facebook 上发布一个墙贴。

这是我正在使用的代码:

在这里,我打开了 Facebook 会话:

- (IBAction)FBSignup:(id)sender {
    [[AppDelegate sharedObject] openSession:^(FBSession *session, FBSessionState state, NSError *error) {
        [self sessionStateChanged:session state:state error:error];
    }];
}

在状态更改时,我使用[self populateUserDetails] 填充数据,然后尝试使用[self postOnFB]在 facebook 墙上发帖,但 facebook 墙上没有帖子。

- (void)sessionStateChanged:(FBSession *)session
                      state:(FBSessionState) state
                      error:(NSError *)error
{
    switch (state) {
        case FBSessionStateOpen:

            [self populateUserDetails];
            [self postOnFB];
            break;

        case FBSessionStateClosed:
        case FBSessionStateClosedLoginFailed:
            [FBSession.activeSession closeAndClearTokenInformation];
            break;
        default:
            break;
    }

    [[NSNotificationCenter defaultCenter]
     postNotificationName:SCSessionStateChangedNotification
     object:session];

    if (error) {
        UIAlertView *alertView = [[UIAlertView alloc]
                                  initWithTitle:@"Error"
                                  message:error.localizedDescription
                                  delegate:nil
                                  cancelButtonTitle:@"OK"
                                  otherButtonTitles:nil];
        [alertView show];
    }
}

在这里,我在需要的地方使用 facebook 用户对象填充数据。

- (void)populateUserDetails
{
    if (FBSession.activeSession.isOpen) {

        [[FBRequest requestForMe] startWithCompletionHandler:
         ^(FBRequestConnection *connection, NSDictionary<FBGraphUser> *user, NSError *error) {

             if (!error) {
               ///////////////////////////////  
               // Populating Data Where Needed
               ///////////////////////////////


              //   [self postOnFB];
             }
         }];
    }
}

在这里,我尝试使用[self postOnFB]发布墙帖,但出现错误:

由于未捕获的异常“com.facebook.sdk:InvalidOperationException”而终止应用程序,原因:“FBSession:在先前的重新授权调用尚未完成时重新授权无效。

我在这里张贴到墙上。

- (void)postOnFB{

    // Ask for publish_actions permissions in context
    if ([FBSession.activeSession.permissions
         indexOfObject:@"publish_actions"] == NSNotFound) {
        // No permissions found in session, ask for it
        [FBSession.activeSession requestNewPublishPermissions:[NSArray arrayWithObject:@"publish_actions"]
                                              defaultAudience:FBSessionDefaultAudienceFriends
                                            completionHandler:^(FBSession *session, NSError *error) {
                                                if (!error) {
                                                    [self fbPostSettings];
                                                }
                                            }];
    } else {
        // If permissions present, publish the story
        [self fbPostSettings];
    }
}

脸书墙贴的设置参数:

- (void)fbPostSettings{

NSDictionary * facebookParams = [[NSMutableDictionary alloc] initWithObjectsAndKeys:
     kFacebookPostLink,                             @"link",
     kFacebookPostImage,                            @"picture",
     kFacebookPostName,                             @"name",
     kFacebookPostCaption,                          @"caption",
     kFacebookPostDescription,                      @"description",
     nil];

    [FBRequestConnection startWithGraphPath:@"me/feed"
                                 parameters:facebookParams
                                 HTTPMethod:@"POST"
                          completionHandler:^(FBRequestConnection *connection,
                                              id result,
                                              NSError *error) {
                              NSString *alertText;
                              if (error) {
                                  alertText = [NSString stringWithFormat:
                                               @"error: domain = %@, code = %d",
                                               error.domain, error.code];
                              } else {
                                  alertText = [NSString stringWithFormat:
                                               @"Posted action, id: %@",
                                               [result objectForKey:@"id"]];
                              }
                              NSLog(@"%@",alertText);
                          }];
}

- (void)sessionStateChanged:(NSNotification*)notification {
    [self populateUserDetails];
}

如果我在某个按钮操作选择器上调用postOnFB(通过 facebook 用户对象完成数据填充后),它会在墙上正常发布。但我需要在startWithCompletionHandler: ^(FBRequestConnection *connection, NSDictionary *user, NSError *error)方法中获取用户对象后发布它。

请帮忙。谢谢大家 :)

4

1 回答 1

6

而不是打开会话然后请求发布权限,而是直接请求发布权限以打开会话

[FBSession openActiveSessionWithPublishPermissions:[NSArray arrayWithObjects:@"publish_stream",
                                                    nil] defaultAudience:FBSessionDefaultAudienceEveryone allowLoginUI:YES completionHandler:^(FBSession *session, 
   FBSessionState state, NSError *error) {
if (FBSession.activeSession.isOpen && !error) {
     [self fbPostSettings]; 
}];
于 2013-03-16T01:40:31.563 回答